Stereoscope



' (No Model.)

4 H. G. W E..

STEREOS No. 5 18;148. Patented Oct. '15, 1895;

'STZ SZ'I'I'NEESEE: INYEN'IDR,

' flMW HA'WLEY 57. WHITE.

ANDREW BGRANAM.PHOTOLITHO-WASHINGTUMDL NIT-ED STATES HAWLEY 0. WHITE, OF NORTH BENNINGTON, VERMONT.

STEREOSCOPE.

SPECIFICATION forming part of Letters Patent No. 548,148, dated October 15, 1895.

Application filed A9 2, 1895- Serial No. 544,13? (No model.)

To wZZ whom it may concern.-

Be it known that I, HAWLEY 0. WHITE, of the village of North Bennington, in the county of Bennington and State of Vermont, have mvented certain new and useful Improvements 1n Stereoscopes, of which the subjoined descr ption, in connection with the accompanying drawings, constitutes a specification.

As the common hand-stereoscope has heretofore been made the hood has only been made to fit the upper part of the face, leaving the space below the plane of the eyes of the observer open, so that much light from below would find access to the eyes, which more or less interferes with perfect vision in using the stereoscope. This invention has for its principal ob ect to remedy this defect and by making certain modifications in the structure of the same to produce a more perfect and cheaper lens-holder than is now used, and also to provide the stereoscope with means whlch will create a practical camera obscura between the face of the observer and the lensframe when the stereoscope is applied to the face in actual use.

The drawings fully explain the invention.

Figure 1 is a view of the bottom or under side of a stereoscope, which shows my improvement in the hood. Fig. 2 is plan view of the shaft, showing the provisions for connecting it with the lens-holder. Fig. 3 is a plan view of the lens-frame.

In Fig. 1 the peculiarities of my hood are exhibited. As scopes are now made the sides of the hood are only carried around past the temples of the face, and the under edge of the lens-holder is slabbed off to make a seat to nail the shaft to. In this case I make the lensholder a complete oval in contour and carry the rabbet B, Fig. 1, entirely around the same. This is essential to provide a seat for the edge of the hood to bear against. The shaft Sis joined to the lens-holder L by means of the tenons T T, Fig. 2, and the round mortises M M in the lens-holder, Fig. 3. These are put together with glue, thus making a secure and neat finish.

The hood is attached to the holder by screws or nails in the usual way, as shown. The outer edge of the hood is cut so as to leave the two concave places 0 C for the prominences of the cheeks, and the two angular prominences P P, which fit the triangular spaces formed by the nose and the face. From this point the hood is cut, as shown at N N, to fit the sides of the nose. In use the bottom edge of the hood at R comes down onto the tip of the nose. By means of this peculiar form of hood and reconstructed shaft and frame for the lenses I greatly increase the efficiency of the scope scope being the commercial name of the article) by making the space between the face of the observer and the inside of the lensholder practically a camera obscura when the instrument is in use. This exclusion of light by the means described is the main function performed by this change of shape in the hood from the old shapes.

By the term hood as used in the claims of this specification I mean the entire shell inclosure or casing forming the dark chamber and do not wish to be understood as confining myself to the especial construction shown and described. 1

Of course an elliptical hood is not broadly new; but hitherto such hoods have stopped far short of the nose on each side and have not fitted the cheeks, so that considerable gaps have been left at the sides of the nose for the inflow of light, making a dark chamber impossible; also, hoods have been used which extend to the nose on each side, but they are not elliptical. They lack prominences which are capable of satisfactorily and closely fitting into the triangular spaces between the nose and the face, and they are without the concavities which fit closely on the cheekbones as well as the extensions which fit closely against the temple. Consequently they cannot make a dark chamber on and about the face when in use.

I therefore claim as my invention and de sire to secure by Letters Patent the follow- 1. A stereoscope consisting of a lens-frame and an elliptical hood which completely encircles its periphery with the exception of a gap at the center of its under side, which is shaped to closely fit the nose and cheeks, the sides of the said elliptical hood being extended to closely fit the temples, the whole forming a dark chamber when applied to the face, substantially as set forth.

2. A stereoscope consisting of a lens-frame and an elliptical hood which completely encircles its periphery, excepting a gap at the center of its under side, the said gap being shaped to closely fit the nose and cheeks and the said hood being constructed with the prominences P, the concavities C and the extensions E, all arranged and operating to form a dark chamber when applied to the face, substantially as set forth.

3. A stereoscope consisting of an elliptical lens-frame rabbeted around its entire periphcry for a seat for the hood, a hood which substantially encircles the periphery of the said frame with the exception of a gap adapted to closely fit the nose and cheeks, a shaft projecting from the said frame, and a picture holder adapted to be adjusted on the said shaft, the said hood being provided with prominences P concavities O and extensions E all arranged and combined to form a dark 

